I spotted what seems to be a bug with the EPOpaqueMat component. The visible absortance input is not taken into account in the IDF files. It stays at 0.7 which is the default value.
What is more disturbing, is that when I tried to modify the default value into the component like so :
It was still written in the IDF file a 0.7 value for visible absortance…
Here’s the GH sample file I used to take the screenshots and the make the test : EPOpaqueMat_visAbs.gh (543.9 KB)